The physiological changes of Yangshan chestnut (Castanea mollissia Blume) during storage were studied. Respiratory rate dropped with the the. The activity of superoxide dismutase (SOD) remained at a higher level in the preliminary phase (about 60 days after storage), and thereafter dropped,whereas the activities of peroxidase (POD), catalase (CAT) increased gradually. The electrical conductivity kept at a lower level during the preliminary phase (about 60 days after storage), and then increased.